Magnetic apparatus



3 sheets-.sheet l INVENTOR ATTORNEY Nov. 17, 1964 A. s. wA-rsoN MAGNETIC APPARATUS Filed oct. 21. leso Nov. 17, 19 A. s. WATSON MAGNETIC APPARATUS 3 Sheets-Sheet 2 Filed Oct. 21. 1960 I .VV ENTOR Nov. 17, w64 A. s. WATSON MAGNETIC APPARATUS Filed 001'.. 2l. 1960 PATENT AGENT United States Patent O 3,157,593 MAGNETIC APPARATUS iexander S. Watson, R0. Box 34,

Dunhm, Quebec, Canada Fiied Get. 21, 1960, Ser. No. 64,159 2 Claims. (Ci. 269-219) This invention relates to magnetic apparatus such as magnetic ore separators and the like.

An object of the invention is to provide an improved form of magnet structure for magnetic apparatus, such structure being capable of convenient manufacture, of ready incorporation in devices such as ore eparators, and of increased elfectiveness in operation.

The invention wiil be described with reference to the accompanying drawings, in which FIGURE l is a side elevation, partly in section, of an ore separator incorporating the present invention,

FIGURE 2 is an end elevation, partly in section, of the ore separator shown in FIGURE l,

FIGURE 3 is an enlarged partial side elevation,

FIGURE 4 is an enlarged sectional partial end elevation,

FIGURE 5 is a side elevation of a somewhat modified form of magnet structure,

FIGURE 6 is a sectional elevation of another form of magnet structure,

FIGURE 7 is a partid plan view of the magnet structure shown in FIGURE 6, and

FIGURE 8 is a side elevation of a modiiied form of apparatus.

Referring to FIGURES 1 to 4, 1 is a supporting frame on which is mounted an arcuate ore-receiving pan 2 having a feed hopper 3 adjacent one side thereof and a concentrate discharge chute 4 and a tailings discharge chute 5 adjacent the other side thereof. lournalled in bearings 6 on the frame is a driving shaft 7 which is driven in any suitable manner. Mounted on the shaft for rotation therewith is an ore separating device generally indicated at 8.

The ore separating device 8 comprises a wheel-like member including a hub 9 fixed to the shaft 7, a radially extending disc 16 xed to the hub and having a ring 11 of suitable metal such as aluminum fixed to the outer ends of the disc.

Exten-ding radiahy outwardly from the outer surface of ring 11 are a plurality of horseshoe magnets 12 bolted to the ring at 13. The poles of each magnet are provided with windings 14. Surrounding the magnets and in contact with the poles thereof is a cylindrical plate 15 of conducting material such as copper and having an inwardly directed radial flange 16 at each edge thereof to provide side guards for the magnet assembly. Fixed to the external surface of plate 15 is a cylindrical plate 17 of aluminum or like metal, such plate 17 being conveniently formed from a series of edge-overlapping arcuate parts 18.

Mounted on the plate 17 are a multiplicity of closely spaced uniformly arranged pins 19 which extend radially outwardly from Lhe plate. The pins 19 are arranged to sweep the interior surface of the pan 2 in closely spaced relation thereto.

Means for energizing and de-energizing the magnet assembly comprises a stationary disc 2t) mounted on a bearing 26a, through which the shaft 7 extends. The disc Ztl carries on its outer periphery a pair of slip rings 21 of copper or like conducting material mounted on an insulator 22 fixed by a bracket 23 to the disc. Each slip ring 21 is divided circumferentially into two substantially equal parts 31a and 31h by insulators 32 interposed between the adjacent ends of the parts. Leads 24 connect the slip parts 31a to any suitable source of elec- 3,157,593 Patented NOV. 17, 1964 ICC trical energy. Shoes 25 mounted on disc 10 as by brackets 26 ride upon the peripher'es of slip rings 21 to provide contacts therewith. As shown, each shoe is carried by an arm 27 pivoted to a bracket 26 at 2S and urged into contact with the slip ring by a spring 29. Each shoe is connected to the magnet windings 14 by a lead 36.

It will be apparent that the magnet assembly will be energized as it moves through a lower path of travel defined by slip rings 31a which form a connection to the source of electrical energy. It will also be apparent that the magnet assembly will be de-energized as it moves through an upper path of .travel defined by slip rings 31b which are in disconnected relation to a source of electrical energy.

The operation of the device will be apparent from the foregoing description. T he energized pontion of the magnet assembly magnetizes the pins 19 as they sweep or rake through the crushed ore bed 42 in the pan 2. The iron or like particles in the ore cling to the magnetized pins 19 and as the latter are de-magnetized when they move past the discharge chute 4, the separated mineral particles drop therefrom and fall through the discharge chute 4. The tailings are discharged through chute 5.

The upper por-tion of the machine may be provided with a protective casing 33.

FIGURE 5 illustrates a modified form of magnet assembly. As shown, each magnet 34 comprises a multiplicity of lengths of steel wires 3S bent into horseshoe form and having their ends terminating in substantially the same plane. The end portions of the wires are spread out as indicated at 36 whereby the ends of the wires are disposed in a plane 37 in which the ends of all the wires of the magnets are arranged in substantially uniformly spaced and continuous order. It will be apparent that such end portions of the wires are the equivalent of the pins 19 of the iirst modification. A winding 38 extends around the adjoining poles of two adjacent magnets, each such winding being adapted to be connected to or disconnected from a source of electrical energy.

In order to support the end portions of the wires 35 in the position described, a support 39 of aluminum or the like is provided in each magnet and comprises a plate 40 disposed between the windings 38 and having a triangular portion 41 disposed between the end portions of the wires of the two poles.

Referring to FIGURES 6 and 7, the magnet structure therein illustrated comprises a plurality of segments 42 each composed of a cast block 43 of plastic composition material having embedded therein a plurality of rows of horseshoe magnets 44, the ends of the legs of which project radially outwardly from the block. The portions of the legs within the block are provided with interconnected windings 4S. Each block has a pair of electrodes 46 projecting inwardly therefrom and to which the ends of the wires constituting the interconnected windings are connected. Each block is mounted on the drum 11 as by means of bolts 47 and the electrodes are connected to the shoes 25. The rows of magnets may be staggered as shown in FIGURE 7.

Referring to FIGURE 8, a modied arrangement of feed and discharge means is shown. A feed hopper 48 carried by a frame 49 is disposed above the ore separating device S for feeding onto the upper portion of the device through a gate 50. It will be apparent that the feed is substantially directly above the axis of the device. A pair of discharge hoppers 51 are arranged below the separating device, one on each side of the axis thereof, and each having a discharge chute 52.

The provision of a multiplicity of projecting pins on the circumference of a drum arranged to sweep a body of ore together with means for directly magnetizing each of such pins, results in a more efficient ore separating procedure. Moreover, the arrangement and means for controlling the magnetizing circuit is of simple and eiective nature.

I claim: Y

V1. Magnetic ore sorting apparatus comprising an annular member having its axis horizontally disposed, a movable disc supporting said member for rotation about said axis, a plastic composition ring ixedto said member in radially outward relation thereto, a plurality of horseshoe-shaped magnetizable members embedded in said ring, each said magnetizable member having a Winding on the legs 'thereof embedded in said ring, electrodes embedded in said ring and electrically connected to said windings, said legs of said magnetizable members having end portions projecting radially outwardly from said ring, said end portions being arranged in a plurality of circumferentially extending rows and having ends disposed in a substantially common circular plane, means for alternately` magnetizing and de-magnetizing said magnetizable members, comprising a stationary disc having a pair of contact rings mounted on the periphery thereof, a plurality of contact members fixed to said movable disc and engaging said contact rings, each of said contact rings having a plurality of disconnected sections, said electrodes and said contact members being electrically connected, and

electrical supply leads connected to one of said Contact ring sections of each said pair, and an oreareceiving pan mounted below said plastic composition ring, and successively receiving a plurality of said end portions for sweeping of said pan by said end portions in response to rotation of said annular member. v

2. Magnetic ore sorting apparatus as defined in claim 1, said end portions in each said row being staggered with respect to said end portions in adjacent rows.

Reierences Cited in the le of this patent UNITED STATES PATENTS 306,778 Ripley Oct. 2l, 1884 1,462,111 Iobke July 17, 1923 2,871,420 Minter et al. Jan. 27,V 1959 2,912,106 Mantin Nov. l0, 1959 2,945,590 Stearns July 19, 1960 3,028,708 Vaughn Apr. 10, 1962 FOREIGN PATENTS 27,102 t Austrda June 5, 1930 622,785 Germany Dec. 6, 1935 777,011 Great Britain `lune l2, 1957 1,016,761 France Nov. 2l, 1952 

1. MAGNETIC ORE SORTING APPARATUS COMPRISING AN ANNULAR MEMBER HAVING ITS AXIS HORIZONTALLY DISPOSED, A MOVABLE DISC SUPPORTING SAID MEMBER FOR ROTATION ABOUT SAID AXIS, A PLASTIC COMPOSITION RING FIXED TO SAID MEMBER IN RADIALLY OUTWARD RELATION THERETO, A PLURALITY OF HORSESHOE-SHAPED MAGENTIZABLE MEMBERS EMBEDDED IN SAID RING, EACH SAID MAGENTIZABLE MEMBER HAVING A WINDING ON THE LEGS THEREOF EMBEDDED IN SAID RING, ELECTRODES EMBEDDED IN SAID RING AND ELECTRICALLY CONNECTED TO SAID WINDINGS, SAID LEGS OF SAID MAGNETIZABLE MEMBERS HAVING END PORTIONS PROJECTING RADIALLY OUTWARDLY FROM SAID RING, SAID END PORTIONS BEING ARRANGED IN A PLURALITY OF CIRCUMFERENTIALLY EXTENDING ROWS AND HAVING ENDS DISPOSED IN A SUBSTANTIALLY COMMON CIRCULAR PLANE, MEANS FOR ALTERNATELY MAGENTIZING AND DE-MAGNETIZING SAID MAGENTIZABLE MEMBERS, COMPRISING A STATIONARY DISC HAVING A PAIR OF CONTACT RINGS MOUNTED ON THE PERIPHERY THEREOF, A PLURALITY OF CONTACT MEMBERS FIXED TO SAID MOVABLE DISC AND ENGAGING SAID CONTACT RINGS, EACH OF SAID CONTACT RINGS HAVING A PLURALITY OF DISCONNECTED SECTIONS, SAID ELECTRODES AND SAID CONTACT MEMBERS BEING ELECTRICALLY CONNECTED, AND ELECTRICAL SUPPLY LEADS CONNECTED TO ONE OF SAID CONTACT RING SECTIONS OF EACH SAID PAAIR, AND AN ORE-RECEIVING PAN MOUNTED BELOW SAID PLASTIC COMPOSITION RING, AND SUCCESSIVELY RECEIVING A PLURALITY OF SAID END PORTIONS FOR SWEEPING OF SAID PAN BY SAID END PORTIONS IN RESPONSE TO ROTATION OF SAID ANNULAR MEMBER. 